// 导入Mock
const Mock = require("mockjs");
// 导入一个工具方法，实现地址上面 ?a=1&b=2 转成 {a:1,b:2}
const { param2Obj } = require("./utils");
// 导入对应模块的mock
const user = require("./user");

// 将对应的mock注入的mocks数组中去交给mock服务器拦截匹配处理
const mocks = [...user];
// for front mock
// please use it cautiously, it will redefine XMLHttpRequest,
// 请求慎重使用它，因为它将重新定义XMLHttpRequest请求
// which will cause many of your third-party libraries to be invalidated(like progress event).
// 这可能会导致很多第三方库失效
function mockXHR() {
  // mock patch
  // https://github.com/nuysoft/Mock/issues/300
  Mock.XHR.prototype.proxy_send = Mock.XHR.prototype.send;
  Mock.XHR.prototype.send = function () {
    if (this.custom.xhr) {
      this.custom.xhr.withCredentials = this.withCredentials || false;

      if (this.responseType) {
        this.custom.xhr.responseType = this.responseType;
      }
    }
    this.proxy_send(...arguments);
  };

  function XHR2ExpressReqWrap(respond) {
    return function (options) {
      let result = null;
      if (respond instanceof Function) {
        const { body, type, url } = options;
        // https://expressjs.com/en/4x/api.html#req
        result = respond({
          method: type,
          body: JSON.parse(body),
          query: param2Obj(url),
        });
      } else {
        result = respond;
      }
      return Mock.mock(result);
    };
  }
  for (const i of mocks) {
    // Mock.mock(匹配地址,请求方式,响应函数/模板对象)
    Mock.mock(
      new RegExp(i.url),
      i.type || "get",
      XHR2ExpressReqWrap(i.response)
    );
  }
}
module.exports = {
  mocks,
  mockXHR,
};
